Intrepid Ace

This creature gets +2/+0 as long as it isn't attacking or blocking.

Iron Fist, Hero for Hire

Trample
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Power-up — {7}{R}: Iron Fist deals 5 damage divided as you choose among up to five targets. Put five +1/+1 counters on Iron Fist. (Activate each power-up ability only once. Reduce the cost by his mana cost if he entered this turn.)

Jack of Hearts, Volatile Hero

Flying, haste
When Jack of Hearts dies, he deals damage equal to his power to each creature.
Power-up — {4}{R}{R}: Discard your hand, then draw three cards. Put two +1/+1 counters on Jack of Hearts. (Activate each power-up ability only once. Reduce the cost by his mana cost if he entered this turn.)

Karolina Dean, Runaway

Flying
At the beginning of your first main phase, add {W}{U}{B}{R}{G}. You can't spend this mana to cast spells from your hand.

Lady Spider, Maybelle Reilly

Reach
Whenever you discard a card, put a +1/+1 counter on target Spider you control.

Treasure

Luke Cage, Hero for Hire

Trample
At the beginning of combat on your turn, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Mjölnir's Might

Mjölnir's Might deals 4 damage to target player.
Exile the top card of your library. Until the end of your next turn, you may play that card.

Molly Hayes, Runaway

Power-up — {5}{R}: Put two +1/+1 counters on Molly Hayes. Exile the top card of your library. Until the end of your next turn, you may play that card. (Activate each power-up ability only once. Reduce the cost by her mana cost if she entered this turn.)

Elemental

Molten Lavamancer

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever a source you control deals noncombat damage to one or more of your opponents during your turn, you create a 1/1 red Elemental creature token. This ability triggers only once each turn.

Vibranium

T'Challa, the Black Panther

Whenever T'Challa enters or attacks, create a tapped Vibranium token. (It's an artifact with indestructible and "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")
Whenever you cast an artifact spell with mana value 4 or greater, put two +1/+1 counters on T'Challa.

W'Kabi, Shield of the Nation

Rhino

Vigilance
Whenever you attack with your commander, if you control an artifact with mana value 4 or greater, create a 4/4 green Rhino creature token with trample.

Nico Minoru, Runaway

Whenever you cast a spell from anywhere other than your hand, Nico Minoru deals 2 damage to each opponent.
{2}{R}, {T}, Discard a card: Exile cards from the top of your library until you exile a nonland card. You may cast that card without paying its mana cost.

Origin of Thor

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — You may discard a card. If you do, draw two cards.
II — Whenever you cast a spell this turn, put a +1/+1 counter on target creature you control.
III — Target creature you control deals damage equal to its power to each opponent.

Pick Up the Pace

Whenever a creature you control that entered this turn attacks, exile the top card of your library.
You may play cards exiled with this enchantment as long as you attacked this turn.

Quinjet Technician

{T}: Add {R}.
{T}: Add {R}{R}. Spend this mana only to activate power-up abilities.

Sky Cycle

Flying
When this Vehicle enters, it deals X damage to up to one target creature, where X is twice the number of Vehicles you control.
Crew 2 (Tap any number of creatures you control with total power 2 or more: This Vehicle becomes an artifact creature until end of turn.)

Marvel Super Heroes Commander